Latch device



J. SCHAEFFER.

LATCH DEVICE.

APPLICATION FILED JULY 21, 1919.

Patented Mar. 16,1920.

2 SHEETS-SHEET l- M fl/mm z 5 lnuzn/mr,

Wfnass,

J. SCHAEFFER.

LATCH DEVICE.

APPLICATION FILED JULY 21,1919.

1 1,333,684. Patented Mar.16,1920.

2 SHEETS-SHEET 2- JOHN scnnnrrnabrnonioonwiscoivsm, Simone-inn mim'r MANU AG- 1 TUBINGCQMPANY,,OE H03ICON,WISGONS IN, A GORPORATION'VOF,WISCONSIN.

citizen o f t he United'jstates, and a resident of Horico'nyin the"ccoiintyofi Dodge n State" of Wisconsin, have invented certain new and useful Improvements in Latch De vices, of which thefollowing is aspec1fica tion, reference being to the accompany- This invention relates to a'latch device de signed primarily for withd'rawingfand' holding out ofoperativeengagement one of the "elements of a gear mechanism, and ithas "for its object to "so construct the latch (that apull thereon will cau'seit to befmoved so am -it will positivelyiholdin retracted or inoperative position the member with which itJiscQDnected;and'will so remain until a further movement inlthe same direction of r the, latch-operating means will caiise' its release andpermitthe return ofsai'd attached member to operative position. This object I accomplish as illustrated in V the drawings and hereinafter describedthe illnstration and the description being in connection Wltll' the nsel'of 't'hejinvention as embodiediin a V ,well-known type: of grain-drill; What I believe to be'negwt willb'ei set': forth in the claims. v I 7 .In" thedrawings v 1 Figure 1 isan endview of the long seedboxof a grain-drill and the gearing'cohnected therewith through which the feeding I ofthe grainfromjthe box is 'comp'elled, and

rear of said seed-box;

showing my improvements Fig. 2 is a rear viewof the-see'd-box and the other parts shown in'Fig. 1, the seedbox being partly broken'away', andfmy im-f. p-rovements being shown applied to the rear wallof said boxiadjac'ent each end thereof;

Fig. 3 is a detail, being-fa vertical section at line 33 of; Fig. 2 and showingthe; gear- I fling 'through gwhich the seededelivering main axleo'f the machine; 7 L Fig-a is an enlarged detail of my improved latching device, the front, plate or cover of thecasing being removed, and showing the movable bar member locked in its raised or retracted position;

- 'niechanism is actuated byfthe rotation ofthe i 5 isa view like-Fig; 4,, but with the movable bar member in" its f'unloc-ke'd" or V lowermost position; f

Fig; 6 is a rear "view of the casing'in T c11 DEVICE;

applied 1 to the" p l g atente(l-Mar. 1 6;,1Q2 O; I Application ned'my ie lefl sri ainaelaaee. f I p 7 which-is movably mounted the latchibar,"the V Be it known'that'I, JOHN SorrAnFrnR, a

View also showing t r-actuating lever and the spring that is slidingly connected with the bar; and

bier" to r Referring'to' themseveral fignres of the drawings,l indicates ,the "long hopper-like seed-box of an ordinary grain-drill. v 'll i'n Fig; 7 isa detail, showing the s a main bears against the movable arinine 'hold it in! either of its adjusted positions.

dica tes a shaftibelow the hopper'and npon which are mounted in the usual manner the 'feeding mechanisms as nsual'. 12 indicates the main axle. of. the machin 13indicates a spur gear, fast upon theaxle-12 and in mesh withv a gear-1'14 that-"in turn meshes with a gear 15 fast np'on the drills'ha'ftlI.

'By means of'such gearing the 'drillshaft rll willbe rotated'upon the forward motion of the machine, as will be understood, .It has beencustoinary to sup'po'rt the gear 14 in a I frame secured to the [shaft 11 *and' to raise such framesnfficiently to Fdraw the gear 14 Under'normal working conditions this gearcarrying frame is held forcedfdown so as to:

compel a constant engagement of the ag- 14E with the gear on the main axle, such, forcing down being. by means of strong "coiled spring 18 interposed betweenthe frame'and 5 a bracket 19 iSeGLl Iedj tO. the rear {face e fthe;

seed-box. My improved I invention has,'infits present application, to y do with improved means. for raising the gear 14. "ont of mesh withlth'e' driving gear on the axle, and is sogcon 1 structed'and'applied that it can be'opei'ated j by the driver at any time while the machine is in motion and without the drivenhaving to leave hisseat. A set-of gearingsuch as described-is ordinarily used at each end of one of these grain-drills, and, asshown in;- Fig. 2, one my improved latchjdevi'ces is f used infconnectio'nwitheachf'set' of such gearing-and thegtwo'latches are so v con g" nected up to a common actuating device that they willbeactliated simultaneously; Inasnluch,however, "as the latch" at each 'eridand 7 the parts? connected immediately therewith are the same, a description of the devices at one end of the seed-box will be sufficient.

7 front or cover plate 21, which, as indicated in Fig. 2, will be bolted to the body portlon 20; The body portion 20 of the casinghas Iindicates a'casing preferably made as a single casting with the exception of its projecting from its rear side lugs .22 through which bolts will be passed to attach it properly in place to the rear wall'of the seedbox. @Thechambe'r of. the casing member 20 isveryconsiderably widerat its'upper end than at its lower end, as clearly shown in Figs. 4 and 5, one of'the side walls of thesaid chamber being shown as curved, and

in the upper, part of the chamber there is 10- cated a block 23; which is preferably formed integral with the 'casing member 20 and which islocated so asto leave a space or passageway between it andthewalls ofthe chamber. One of theside or edge walls of the chamber is indicated by 24, and the other .by the latter b eing shown as very decidedly curved so as to bring its .lower downwardly-extendin g projection 28, theedges of which are curved. The pro ection 28 projects substantially opposite the center portion of the upper edge of the block 23 and such upper edge is quitedeeply curved in such mannerso as to form, 111 connection V with the downward projection-28, a curved passageway 29 that connects the two recesses 26 27the upper ends ofthe block 23 extending into the sald recesses, as shown.

, Y 30 indicates a bar, here shown as formed of a strip of plate metahwhich carries at its lower end a stud 31 that projects toward the inner; face of the chamber and isof a size and shapeto adapt it to travel freely through the spaces at each side of the block I 23 and through the connecting passage 29 its length being such as to allow the inner face of the bar 30 to move in contact, or nearly so, with the block 23, the outer face of which block, will ordinarily be flush .Withthe outer face of the casing. .The cover 21 of the casing will be provided with side flanges so that the body of the cover when in place will lie close to the outer face of the bar 30 so as to hold such bar movably in place in the casing. The upper marginal portion of the cover plate 21 will not be flanged, of course, and thusthe bar is allowed to project from the casing and be 'gn-ovedfreely up. and down, as hereinafter described. Rising fromthe upper end of the casing body 20, and preferably cast therewith, is a bracket 32, to the upper end of which is pivotallyaattached by a pivot bolt 33 a bent lever 34, the bracket being preferably bifurcated and the bent lever located in such bifurcation. The outer end of the shorter arm of the bent lever is pivot ally connected to the arm 30 at a short distance below the upper end of such arm, the pivot being indicated by 35. At the end of the longer arm of the bent lever I have shown an eye, indicated by 36, to which to I attach a rope that leads to a point convenient to the operatorof the machine. 37 and38 indicate the two arms of a spring, an intermediate portion of which, indicated by 39, is coiled, and, as shown in Fig. 6, is placed around the inner end of the pivot bolt 33 and suitably secured thereon bya washer, which washer may be held in place by upsetting the end of the bolt against it or. by a nut secured on thebolt. One end of this spring the longer one in the construction shown-. is extended down and held against. a stud on the face of the casing while the other end extends forward and has a sliding connection with the upper end of the arm 30- the connection of this spring arm with the arm 30 being eflected, in the construction shown, by passing the spring arm 38 1oosely through a transverseopening in a short stud 40 that is rotatably mounted in the upper end of the arm 30. 41 indicatesa link, the upper end of which is turned to adapt it to hook into a hole 42 formed in the short arm of the bentlever 34 and having. another hook at its lower endto adapt it to connect with a loop 4301, other device carried by the movable frame 16 in which the gear 14 is journaled. 44' is a rope made fastin' the eye 3610f the bent lever 34, and, as shown in Fig. 2,the ropes 44 leading from the devices at the opposite ends of the seed-box pass through aneye 45 rigidlyafiixed to a central portion of the upper part of the seed-box, and both of them lead to a point within convenient reach of the operator, and, if desired, may, after passing through the said eye 45, be connected together or to a common shifting device so that at one operation both of the bent levers 34 will be operated simultaneously.

\Viththe latch mechanism in the position indicated in Fig. 5 and with the gear frame 16 connected with the bent lever 34through the medium of the link 41, the various gears through which the seeding mechanism is driven will be in mesh as in Fig. 1. Now, when it is desired to stop the seeding operation the driver will, by a pull on the rope 44, turnthe bent lever134 on its pivot 33 and in doing that he willcause such lever to turn as far as possible. The move ment of the lever backward on its pivot will the gear M-raisedand outof' mesh with the driving gear 13 due'to the connection, by means ofthe link' ll, of the-gear frame" 16' bestoppedby reasonof thefstud 311 at the lower end-of the arm,3 0 eoming in contact with the upper part Of the curvededge :of the recess 26. Upon the lever' -being" thus stopped the operator. will releaseith e pull,

and thereupon, under the influence of the: spring that is coiled around the k pivot bolt '33 and that has one of its arms slidingly' engaging the stud at the upper endof the arm 30,;such arm will be forced not only I downward but it will be turned on its pivot 35 to swing the part below the pivot toward the left as seen in Fig. 4;. The stud3l will by contact with'thecurvededge ofthe"pro-- jectioni28 be directed: into the passage 29 and against the curved upper edge of the block'i23 whereit' will be broughtto rest, as

' during the firstpa'rt of-the longitudinal shownfin Fig. '4. The 'downwardgp'ressureq of thespring arm 138 will hold it" firmly against theblock and thus, of course, hold with the short armof the bent lever 34. To release :the looking engagementuof the arm 3Q withithe block 23 -the"operatonwfll give another pull upon the; -rope'-to ,turn; the bentflever in the same: direction that-it'was turned to efiecta raising of the arm to lockedge-25, Such downward movement brings the parts into the position shown in Fig. 5,

and, ogE course, also carries down the, gear frame 16 so as tob'ringthe gear "14, carried thereby again into aopefrative: relation I with Byl'reas'onof the sliding engagement of the spring a'r'1n381 with the bar 'SQ aboVe the i point of pivotal attachment'of such bar with the operating -1ever'34 it will be seenlthat movementof the barto carry its lower end toward the upper part ofthecha'mber the 1 pressure of the sp'r'ing will be exerted in substantially a downward 5 direction,that

will oppose the longitudinal-moveniient of the with but very little tendency to cause it to swing on its pivot. As the stud," 31 ,enters the space between the upper part of the bl'ock23 and the adjacentjside wall 2a the inner end ofthe banwillg of' course, turn inward and "thereupon the springwill tend to force' such innerend-of' the bar to ward and against the side ofth'e bloclQ -tlie V result being that-as the stud;31 enters jth'e I recess 26 the spring .,Wi1l soturn the bar as to move the'stud'against the side of the pro'v jection 28, and, upon the release of the pnll v "or other device in the same direction.

on theleventhe stud wilhby reason of the spring 'pressure, be guided down bythe pro-f je'ction '28" against the curved" or recessed upper edge of the block 23 and ther'e held. until the next pullon the lever causes its disengagement and its-entry intotherecess 27- ,:asfibef0re, stated. i w

By my invention I-provide a'latching device of very simple construction which is ca- 1 pable of being operated by a single stroke of ,a lever orotherdevice that will 'cause a 4raising:and locking of the latch bar and v which can only'be released from locking position by a short stroke of the same lever VVhat I iclaimas my invention and desire V to secure byLetters Patent, is-

1. device of the class ,descrihed, comprising incombination a casing, abar longitudlnally movable therein and projecting therefrom at one end, a's top in and'near one. end of said casing, and means connectedwith said bar-E and adapted by successive movements 1n the-same direct on tomove the bar t into position to be first engaged by said stop and then be releasedtherefromi 0 2 A devicefof the class described, com-; I

prisin'g -incombiirationa casing, apivoted 'bar l 'ongitudinallyand laterallyQmovable l I therem andprojectingtherefrom at onefend, 1 1 a stop in and near one end of 'saidcasing, a

spring for causing the ba'r to movelatera'lly and for holding it in engagenientw-ith said stop, and means connected'with said bar'and 1L 7 adapted-by successive movements: in the same d1rect1on' to longltudlnally move said bar to first 'bringuts lnner end into position tobe engaged with said stop and then mov-' ;ing it away'fro n'saidstop. t-

"BAA-device of'the class described, com;

1 prising incombination a casing, ai aivotecl bar 7 longitudinally anddaterally movable therein astop in-and'nearone end of'said casing and ofthe chamber of the casing to form aguid- 111g passage, for the said, stud, spring for causing thefbar to; move vlaterally andlifor,

holding said stud-in engagement' with said stop, and means connected with said bar and 7 adapted by successive movements in the same permit saidstud to engage said stop and away therefrom;

4; A gdevlce'of the class described, compr sing in combination: a caslng, a bar lonthen disengage it-from the stop'an'd move it" i 'gitudinal'ly' and laterally-- 'movable therein and-projecting therefrom'at one end, a stop in said'ca sing wit'h which said bar is adapt-- ;and projecting therefrom at one end, a stud on one -face'of the bar ad acent its inner end,

standing} at a distance from the edge walls v directiongto longitudinally nlove the bar to t ecl-to engage, -'means movable in one direction V for longitudinally moving said arm to bring 9 ts nner end POItlOK nto position to engage said stop and thereafter movable'in the same direction for releasing said bar from said stop, andmeans forcompelling' the lnner end of said arm to move laterally over and away from said stop. s r

5. A devlce of the class described, comprising in combmation a cas1ng,a bar longi- V tudinally and laterally movable therein and projectingtherefrom at one end,a stop in said casing with which saidbar is adapted tolengage, means movablein one direction for longitudinally moving said arm to bring its inner end portion: into position to engage said stop andthereafter movable in the same direction for releasing said bar from said stop, and resilient means for com-:

pelling thednner end of said arm to move laterally over and away from said stop.

6. A device of the class described, com prising in combination a casing, a bar longitudinally and laterally movable therein and projecting therefrom at one end, a stop in said casing with which said bar is adapted to engage, means movable in one direction for. longitudinally moving said arm to bring its inner end portion into position toengage aid stop and thereafter movable in the same direction for releasing said bar from said stop, and aspring connected with said bar for opposing its longitudinal movement in one direction and for compelling a lateral movement of-"the arm when said arm a is her of the casing and by a succeeding movemoved into and out of engagement with said stop; i '7 a j 7. A device of the class described-comprising incombination a casing, a barlongitudinally and laterally movable therein and projecting therefrom atone end, a stop in said, casing, means for "moving said bar longitudinally in one direction between the stop and one of the side walls of the chamment of said means in the same direction 7 permitting areverse movementof the arm between the stop and the other side wall of said chamber, anda spring device acting upon said bar for causing an engagement of the bar with thestop-between successive operations of said bar-moving means.

8. A device of the class described, comprising in combination a casing, a bar longitudinally and laterally movable therein moving means.

9. A device'of the class described, corn-L prising in combination-a casing, a bar longi- 7 from said stop.

tudinally and laterally movable therein and projecting therefrom at one end, a stud ex tending from one face of and near the inner end of said bar, a'istop in the chamber of said casing near one end thereof, said stop, having a recess in its upper edge and the upper walliof the chamberhaving a projection extending downward toward said re cessededge, means for moving ,said bar longitudinally in one direction along one side of said stop to bring said stud into proximity to said downwardlyextending projection and by a succeeding movement of said meansin the same direction permitting a reverse movement of the barat the other side of said stop, and aspring device acting upon said bar for causing an engagement of the stud with the recessed edge of the stop between successive operations of the said bar-moving means, said downwardly-extending projection acting to guide said stud toward and awayv from said stop.

10. A device of the class described, comprising in combination a casing, a bar longitudinally movable therein and having one end projecting therefrom, a stop in and near one end of said casmg, a lever pivoted upon a fixed support and also pivotally 7' connected to the projecting portion of said bar, 'a stud adjacent the inner endof the 'bar for engaging said stop when said bar 1 is moved longitudinally in. one direction by a stroke of the lever, and a spring connected with said arm to turn itat theconclusion of said longitudinal movement and force it into engagement with the stop, said spring upon the next succeeding stroke of the lever in thesame direction carrying said stud past and free from-said stop. V i

11. Adevice of theclass described, comprising in combination a casing, a bar longitudinally movabletherein and, having one end projecting therefrom, a stop :in and near one end of said casing, a lever pivoted a upon a fixed support and also pivotally con nected to the projecting portion of said bar at a distance from the outer end thereof, a stud adjacent the inner end of the bar for engaging said stop when saidbar is moved longitudinally in one direction by a stroke of the lever, and a spring carried by a fixed support at one side of said arm andslidingly engaging said arm above the point of pivotafconnection of the armfwith thelever, said spring acting to turn said bar at the conclusion of said longitudinal moves ment to force the stud on said bar into'engagement with said stopand upon the next succeeding stroke of the lever in the same direction 'carryingsaid stud past and free Jenn sonanrnnn 

